[PATCH v3 15/15] iommu: Clean up bus_set_iommu()

[Tian, Kevin]

> From: Robin Murphy <robin.murphy at arm.com>
> Sent: Wednesday, July 6, 2022 1:09 AM
> 
> Clean up the remaining trivial bus_set_iommu() callsites along
> with the implementation. Now drivers only have to know and care
> about iommu_device instances, phew!
> 
> Signed-off-by: Robin Murphy <robin.murphy at arm.com>

Reviewed-by: Kevin Tian <kevin.tian at intel.com>